1989-1992 Perth Mint $5 1/20th oz gold (1.55g, 0.999) 'Australian Nugget' Proofs in wallets, plus 1989 & 1990 $5 1/20th oz platinum (1.55g, 0.9995) 'Koala' Proof wallet.  (6) (Image1)

Estimate AU$400

1990 & 1992 Perth Mint Mini-Proof combination sets each comprising $5 gold (.9999) 1/20th oz 'Australian Nugget', $1 silver (.999) 1oz 'Kookaburra', and $5 platinum (.9995) 1/20th oz 'Koala';  (2 sets, 6 coins) (Image1)

Estimate AU$400

1997-1999 Perth Mint Mini-Proof combination sets each comprising $5 gold (.9999) 1/20th oz 'Australian Nugget', $1 silver (.999) 1oz 'Kookaburra', and $5 platinum (.9995) 1/20th oz 'Koala'. (3 sets; 9 coins) (Image1)

Estimate AU$600

1999  $100 Bi-Metal Perth Mint Centenary Proof gold Sovereign, 'P100' mintmark in exergue, silver surround, agw 0.2354oz and asw 0.161oz, boxed with certificate and cardboard outer. (Image1)

Estimate AU$500

2000 $20 Bi-Metal Millenium Coin, rev. 'THIRD MILLENIUM FIRST DAY' on silver surround, 22ct gold centre depicting Australia on globe, agw 0.27oz, asw 0.161oz, boxed with certificate and cardboard outer. (Image1)

Estimate AU$500

2000 The Sydney Olympic Coin Collection comprising $100 gold (10.021g, 0.999) 'Preparation', $5 silver (31.635g, 99.9) 'Emu & Wattle' and 'Reaching The World', cased with certificate #03897. (3) (Image1)

Estimate AU$750